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Two half reactions of an electrochemical...

Two half reactions of an electrochemical cell are given below `:`
`MnO_(4)^(-)(aq) + 8 H^(+) (aq) + 5e^(-) rarr Mn^(2+) (aq) + 4H_(2) O ( l ) , E^(@) = + 1.51V`
`Sn^(2+)(aq) rarr Sn^(4+) ( aq) + 2e^(-) , E^(@) = - 0.15V`
Construct the redox equation from the standard potential of the cell and predict, if the reaction is reactant favoured or product favoured.

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